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AbstractAbstract
No abstract available
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Secondary Subject
Source
ANS winter meeting; San Francisco, CA, USA; 27 Nov 1977; See CONF-771109--. Published in summary form only.
Record Type
Journal Article
Literature Type
Conference
Journal
Transactions of the American Nuclear Society; v. 27 p. 460-461
Country of publication
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INIS IssueINIS Issue
AbstractAbstract
No abstract available
Original Title
Patent
Primary Subject
Source
26 Feb 1974; 4 p; US PATENT DOCUMENT 3,794,560
Record Type
Patent
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Kleine-Tebbe, K.A.; Kemter, F.
IAEA specialists' meeting on gas-cooled reactor seismic design problems and solutions1983
IAEA specialists' meeting on gas-cooled reactor seismic design problems and solutions1983
AbstractAbstract
[en] The seismic response of a great pebble bed HTR has been examined theoretically by preliminary calculations. The total system to be considered, consisting of the core and the side reflector, is restrained by spring pack assemblies. The calculations of the natural frequency of the pebble bed based on different theoretical models led to values of 6 to 10 Hz or higher. This is close beyond the region of maximum magnification. The natural frequency of the system side reflector-pebble bed was found to be approx. 10 Hz or more, which assures rigid body behavior. The seismic behavior of the KLAK shut down system has been investigated experimentally. Most of the KLAKs will remain inside the pebble bed during an earthquake, they will be removed totally only from a flat layer of the pebble bed surface. To get more exact information about the pebble bed reactor seismic response the calculations shall be checked by model experiments with different scaled-down HTGR-core models. The main concerns of these investigations are: dynamic behavior of the pebble bed; sloshing of pebbles at the core surface and at higher acceleration levels possibly inside the core; dynamic response of the side reflector and its interaction with pebble bed and spring packs; collisions between the blocks within the top reflector and between the outer blocks of the top reflector and the side reflector; and adaption of the parameters to different computer codes to calculate the dynamic behavior of the reactor more precisely
Primary Subject
Secondary Subject
Source
GA Technologies, Inc., San Diego, CA (USA); p. 119-132; Jun 1983; p. 119-132; IAEA IWGGCR specialists' meeting on gas-cooled reactor seismic design problems and solutions; San Diego, CA (USA); 30 Aug - 1 Sep 1982; Available from NTIS, PC A13/MF A01; 1 as DE83014928
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Primary Subject
Secondary Subject
Source
ANS annual meeting; San Diego, CA, USA; 18 Jun 1978; See CONF-780622--. Published in summary form only.
Record Type
Journal Article
Literature Type
Conference
Journal
Transactions of the American Nuclear Society; v. 28 p. 379-380
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Brodkin, E.; Lebedev, G.
Proceedings of the international conference on mathematics and computations, reactor physics, and environmental analyses. Volume 1 and 21995
Proceedings of the international conference on mathematics and computations, reactor physics, and environmental analyses. Volume 1 and 21995
AbstractAbstract
[en] The two-dimensional cylindrical model of HTR-ASTRA fuel pebble bed assembly was used in the transport calculations of keff and corresponding Rossi-α for interpretation of pulsed neutron measurements which have been carrying out during approach to critical mass. This analysis demonstrates possibility to evaluate keff above 0.9 using α-prompt decay constant measured during core loading by fuel balls and to extrapolate these data for determination of critical mass similar to inverse counting technique
Primary Subject
Source
Anon; 1629 p; 1995; p. 1301-1305; American Nuclear Society, Inc; La Grange Park, IL (United States); International conference on mathematics and computations, reactor physics, and environmental analyses; Portland, OR (United States); 30 Apr - 4 May 1995; American Nuclear Society, Inc., 555 N. Kensington Ave., La Grange Park, IL 60525 (United States)
Record Type
Book
Literature Type
Conference
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Schulten, R.
Kernforschungsanlage Juelich G.m.b.H. (Germany, F.R.)1987
Kernforschungsanlage Juelich G.m.b.H. (Germany, F.R.)1987
AbstractAbstract
[en] The loading of the inside of the reactor with fuel element pellets is done via a central tube. There is a blower in the area of the tube, by which the compressed air and the suction air in the tube can be varied. In this way, the speed of fall of the fuel element pellets in the tube is variable, so that they hit the pebble bed with different speeds of fall. The place at which the fuel element comes to rest on the heap inside the reactor can be determined in this way, within certain limits. (DG)
[de]
Die Beschickung des Reaktorinnenraumes mit BE-Kugeln erfolgt ueber ein zentrales Fallrohr. Im Bereich des Fallrohres befindet sich ein Geblaese, mit dem die Druckluft als auch die Saugluft im Fallrohr variiert werden kann. Hierdurch ist auch die Fallgeschwindigkeit der BE-Kugeln im Fallrohr veraenderbar, so dass diese mit unterschiedlichen Fallgeschwindigkeiten auf den Kugelhaufen auftreffen. Somit laesst sich der Ort in gewissen Grenzen festlegen, an dem ein BE innerhalb des Reaktors auf dem Schuettkegel zur Ruhe kommt. (DG)Original Title
Verfahren zur Beschickung des Reaktorinnenraums eines Kugelhaufenreaktors sowie Vorrichtung zur Durchfuehrung dieses Verfahrens
Primary Subject
Source
14 May 1987; 20 Jun 1985; 5 p; DE PATENT DOCUMENT 3521988/C2/; ?: 20 Jun 1985
Record Type
Patent
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Brandes, S.
Hochtemperatur-Reaktorbau G.m.b.H., Dortmund (Germany, F.R.)1985
Hochtemperatur-Reaktorbau G.m.b.H., Dortmund (Germany, F.R.)1985
AbstractAbstract
[en] The device makes it possible to achieve an even design of the edge zone with a small number of supply pipes, without adverse effect on the flow of pellet operating elements into the active core. In order to build up the edge zone, an annular separation reaching to the surface of the pebble bed is fitted to the lower edge of the ceiling reflector, so that an annular gap is formed between the solid reflector jacket and the pebble bed separation, in which the graphite elements of the edge zone are placed and which is continued to the ceiling reflector. The central surface of the edge zone lies above the central surface of the operating pebble bed, preferably inside the part of the annular gap situated in the ceiling reflector. (orig./HP)
[de]
Die Vorrichtung gestattet, mit einer geringen Anzahl von Zufuehrungsrohren eine gleichmaessige Ausbildung der Randzone zu erreichen, ohne dass das Fliessen der kugelfoermigen Betriebselemente in dem aktiven Kernbereich beeintraechtigt wird. Zur Bildung der Randzonen ist an der Unterkante des Deckenreflektors eine ringfoermige, bis an die Oberflaeche der Schuettung reichende Schuettungs-Trennung so angebracht, dass zwischen dem festen Reflektormantel und der Schuettungs-Trennung ein ringartiger Spalt gebildet wird, in den die Graphitelemente der Randzone eingegeben werden und der sich bis in den Deckenreflektor hinein fortsetzt. Die mittlere Oberflaeche der Randzone liegt ueber der mittleren Oberflaeche der Schuettung der Betriebslemente, vorzugsweise innerhalb des in dem Deckenreflektor befindlichen Teiles des ringartigen Spaltes. (orig./HP)Original Title
Vorrichtung zum Aufbau einer Randzone aus reinen Graphitkugeln um die Betriebselementschuettung eines Hochtemperaturreaktors
Primary Subject
Source
25 Jul 1985; 27 Aug 1977; 6 p; DE PATENT DOCUMENT 2738729/C/; ?: 27 Aug 1977
Record Type
Patent
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Nuclear fuel cycles were evaluated for the Pebble Bed Gas Cooled Reactor under development in the Federal Republic of Germany. The basic fuel cycle specified for the HTR-K and PNP is well qualified and will meet the requirements of these reactors. Twenty alternate fuel cycles are described, including high-conversion cycles, net-breeding cycles, and proliferation-resistant cycles. High-conversion cycles, which have a high probability of being successfully developed, promise a significant improvement in resource utilization. Proliferation-resistant cycles, also with a high probability of successful development, conpare very favorably with those for other types of reactors. Most of the advanced cycles could be adapted to first-generation pebble bed reactors with no significant modifications
Primary Subject
Secondary Subject
Source
Sep 1978; 60 p; Available from NTIS., PC A04/MF A01
Record Type
Report
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Kugeler, K.; Phlippen, P.W.; Schmidtlein, P.; Muehlensiep, J.
Kernforschungsanlage Juelich G.m.b.H. (Germany, F.R.)1987
Kernforschungsanlage Juelich G.m.b.H. (Germany, F.R.)1987
AbstractAbstract
[en] In order to increase safety, particularly for the reliable removal of post-fission heat, for example in accidents, a heat exchanger is accommodated in the side reflector, which is connected to a hot and cold water pipe, which in turn forms the secondary circuit. (DG)
[de]
Zur Erhoehung der Sicherheit, insbesondere fuer die zuverlaessigere Abfuhr von Nachzerfallswaerme, bei z.B. Stoerfaellen, ist ein Waermetauscher im Seitenreflektor untergebracht, der an eine Heiss- und Kaltwasserleitung angeschlossen ist, die wiederum die Straenge eines Sekundaerkreislaufs bilden. (DG)Original Title
Hochtemperatur-Kernreaktor
Primary Subject
Source
19 Mar 1987; 4 Jun 1985; 6 p; DE PATENT DOCUMENT 3519935/C2/; ?: 4 Jun 1985
Record Type
Patent
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Neef, H.J.
Kernforschungsanlage Juelich G.m.b.H. (Germany, F.R.)1977
Kernforschungsanlage Juelich G.m.b.H. (Germany, F.R.)1977
AbstractAbstract
[en] If a graphite reflector of a pebble bed reactor is equipped with insertable absorber rods power control is achieved by less insertion depth of these rods than would be required for conventional designs for the same type of reactor. Therefore the difficulties growing with insertion depth and the danger of damaging fuel elements are reduced. With less stroke, the drives of the control rods are simplified, too. A means for this is doping the graphitic reflector bottom and the lower part of the reflector with neutron-absorbing material. A partial flow of neutrons forced downwards on insertion of the control rods into the upper zone of the reflector will be absorbed in this lower region. A formula is given for this doping. (HP)
[de]
Die Ausruestung des Graphitreflektors eines Kugelhaufenreaktors erfordert bei der Leistungssteuerung mittels einzufahrender Absorberstaebe geringere Eintauchtiefen dieser Staebe als herkoemmliche Konstruktionen fuer den gleichen Reaktortyp. Damit werden die, mit der Eintauchtiefe wachsenden Schwierigkeiten und die Gefahr der Beschaedigung von Brennelementen verringert. Auch die Antriebe werden bei geringerem Hub der Steuerstaebe vereinfacht. Mittel hierzu ist die Dotierung des graphitischen Reflektorbodens und des unteren Teils des Reflektors mit neutronenabsorbierenden Stoffen. Ein Teilfluss von Neutronen, der beim Einfahren der Steuerstaebe im oberen Reflektorbereich nach unten abgedraengt wird, dann in diesem unteren Bereich absorbiert. Fuer diese Dotierung ist ein Formelwert genannt. (HP)Original Title
Kernreaktor
Primary Subject
Source
17 Mar 1977; 3 p; DE PATENT DOCUMENT 2365531/C/; Also available from Dt. Patentamt, Muenchen (FRG); 1 fig.
Record Type
Patent
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
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